J/ApJ/825/L22 BVRI LCs of type Ib supernova iPTF13bvn (Folatelli+, 2016)
Disappearance of the progenitor of supernova iPTF13bvn.
Folatelli G., Van Dyk S.D., Kuncarayakti H., Maeda K., Bersten M.C.,
Nomoto K., Pignata G., Hamuy M., Quimby R.M., Zheng W., Filippenko A.V.,
Clubb K.I., Smith N., Elias-Rosa N., Foley R.J., Miller A.A.
<Astrophys. J., 825, L22-L22 (2016)>
=2016ApJ...825L..22F 2016ApJ...825L..22F (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Photometry, UBVRI
Keywords: galaxies: individual: NGC 5806; stars: evolution; supernovae: general;
supernovae: individual: iPTF13bvn
Abstract:
Supernova (SN) iPTF13bvn in NGC 5806 was the first Type Ib SN to have
been tentatively associated with a progenitor in pre-explosion images.
We performed deep ultraviolet (UV) and optical Hubble Space Telescope
observations of the SN site ∼740 days after explosion. We detect an
object in the optical bands that is fainter than the pre-explosion
object. This dimming is likely not produced by dust absorption in the
ejecta; thus, our finding confirms the connection of the progenitor
candidate with the SN. The object in our data is likely dominated by
the fading SN, implying that the pre-SN flux is mostly due to the
progenitor. We compare our revised pre-SN photometry with previously
proposed models. Although binary progenitors are favored, models need
to be refined. In particular, to comply with our deep UV detection
limit, any companion star must be less luminous than a late-O star or
substantially obscured by newly formed dust. A definitive progenitor
characterization will require further observations to disentangle the
contribution of a much fainter SN and its environment.
Description:
We obtained deep imaging of the field of iPTF13bvn ∼740 days after
explosion using HST through Cycle 22 programs GO-13684 and GO-13822.
Program GO-13684 was executed between 2015 June 26.37 and 26.60 (UT
dates are used herein) with the Wide Field Camera 3 (WFC3) UVIS
channel. Program GO-13822 comprised observations obtained on 2015 June
30.63 with WFC3/UVIS (F225W filter) and on June 30.90 UT with the
Advanced Camera for Surveys (ACS; F814W filter).
The supernova (SN) location in the pre- and post-explosion images was
found by aligning them relative to a F555W image obtained through
program GO-12888 with WFC3/UVIS on 2013 September 2.37 when the SN was
still very bright.
We also obtained BVRI imaging of iPTF13bvn until ∼280 days with the
Katzman Automatic Imaging Telescope (KAIT) and the 1m Nickel telescope
at Lick Observatory (see table 3). Apparent magnitudes were first
measured in the KAIT4 natural system and then transformed to the
standard system using local calibrators and color terms as given in
Table 4 of Ganeshalingam et al. (2010, J/ApJS/190/418).
Objects:
----------------------------------------------------
RA (ICRS) DE Designation(s)
----------------------------------------------------
15 00 00.15 +01 52 53.2 iPTF13bvn = iPTF 13bvn
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 68 42 KAIT and Nickel Photometry of iPTF13bvn
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See also:
J/A+A/580/A142 : SN 2011dh. The first two years (Ergon+, 2015)
J/A+A/574/A60 : Light curve templates of SNe Ib/c from SDSS (Taddia+, 2015)
J/A+A/573/A12 : SN1993J spectra 100-500d post-explosion (Jerkstrand+, 2015)
J/A+A/562/A17 : SN 2011dh - The first 100 days (Ergon+, 2014)
J/MNRAS/436/774 : Core collapse supernovae (type Ibc) (Eldridge+, 2013)
J/A+A/558/A131 : Model spectra of hot stars at the pre-SN stage (Groh+, 2013)
J/ApJ/741/97 : Light curves of Ibc supernovae (Drout+, 2011)
J/ApJS/190/418 : Light curves for 165 SNe (Ganeshalingam+, 2010)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 8 F8.2 d MJD Modified Julian date
10- 15 F6.2 d Phase Rest-frame phase (1)
17 A1 --- l_Bmag Limit flag on Bmag
19- 23 F5.2 mag Bmag [15.8/21.7] Apparent B band magnitude
25- 28 F4.2 mag e_Bmag [0.05/0.5]? One sigma uncertainty in Bmag
30- 34 F5.2 mag Vmag [15.2/21]? Apparent V band magnitude
36- 39 F4.2 mag e_Vmag [0.02/0.2]? One sigma uncertainty in Vmag
41- 45 F5.2 mag Rmag [14.9/20.7]? Apparent R band magnitude
47- 50 F4.2 mag e_Rmag [0.01/0.2]? One sigma uncertainty in Rmag
52- 56 F5.2 mag Imag [14.8/20.5]? Apparent I band magnitude
58- 61 F4.2 mag e_Imag [0.01/0.2]? One sigma uncertainty in Imag
63- 68 A6 --- Tel Telescope name (2)
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Note (1): In days after the explosion (JD=2456459.24).
Note (2): Telescope as follows:
KAIT = Katzman Automatic Imaging Telescope.
Nickel = The 1m Nickel telescope at Lick Observatory.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 02-Sep-2016